Defensive publication t



. g (A g) DEFENSIVE PUBLICATION T UNITED STATES PATENT OFFICE Publishedat the request of the applicant or owner in accordance with the Noticeof Apr. 11, 1968, S49 0.G. 1221. Identlfication is by serial number ofthe application and the heading indicates the number of pages ofspecification, including claims, and of sheets of drawing contained inthe application as originally filed. The file of this application isavailable to the public for inspection; reproduction may be purchasedfor 30 cents per sheet.

Applications published under the Defensive Publication Program have notbeen examined as to tho merits of alleged invention. The Patent Officemakes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED APRIL 8, 1969 758 698 PHOTOCATALYTOGRAEHIC PROCESS OF PRO-DUCING IMAGE STRUCTURES AND IMAGE RELIEFS Jorg Jaskowsky, Ruit,Wurttemberg, Germany Filed Sept. 10, 1968. Published Apr. 8, 1969 Claimspriority, application Germany, Apr. 4, 1968, P 1,772 Class 96-48 NoDrawing. 5 Pages Specification A photocatalytographic process forproducing images is described which comprises exposure toelectromagnetic or corpuscular radiation of a chemical material ormaterial system to produce a substance (the latent image) which has aninductive and/ or catalytic effect on a second metastable chemicalsystem (the developer) Whose inductively or catalytically producedreaction products intensify the latent image. In an example, arsenichydride is imagewisc exposed to actinic radiation to form a latent imageof elemental arsenic which is developed with a solution of sodiumdibromoauriate. The resulting gold image is further intensified with acopper physical developer to give an electrically conducting image.

